Breaking News
Is 'Project Freedom' Just Another Trump Scam?
THEY LIED About the Water - THE WELLS ARE GOING DRY GLOBALLY
After Attack of Cargo Vessel, Trump Directs US to Escort Foreign Ships Through Hormuz
RED ALERT: "I Think That You're Gonna See Billions Dead At This Rate!"
Top Tech News
Robot Dives 1.5 Miles, Maps French Shipwreck With 86,000 Images And Recovers Artifacts
Brain-inspired chip could reduce AI energy use by 70%
CANCER HAS BEEN CURED
"This is the first synthetic species," microbiologist J. Craig Venter told 60 Minutes'
Humanoid robots are hitting the factories at an increasing pace
Microsoft's $400 Billion Mistake Is Now a $200 Phone With Zero Tracking
Turn Sand to Stone With Vinegar. Stronger Than Steel. Hidden Since 1627
This is a bioprinter printing with living human cells in real time
The remarkable initiative is called The Uncensored Library,...
Researcher wins 1 bitcoin bounty for 'largest quantum attack' on underlying tech
18 qubits entangle using six photons
They used
* 30 single-photon interferometers in total.
* The outputs are detected by 48 single-photon detectors
Scheme and experimental setup for creating and verifying 18-qubit GHZ state consisting of six photons and three degrees of freedom. a. The generation of six-photon polarization-entangled GHZ state. An ultrafast laser with a central wavelength of 788 nm, a pulse duration of 120 fs and a repetition rate of 76 MHz is focused on a lithium triborate (LBO) and up-converted to 394 nm. The ultraviolet laser is focused on three custom-designed sandwich-like nonlinear crystals, each consists of two 2-mm thick β-barium borates (BBOs) and one half-wave plate (HWP), to produce three pairs of entangled photons. In each output, two pieces of YVO4 crystals with different thickness and orientation are used for spatial and temporal compensation for the birefringence effects. The three pairs of entangled photons are combined on two polarizing beam splitters (PBSs) to generate a six-photon polarization-entangled GHZ state. b.